---
id: CVE-2026-121405
title: FreeRDP before 3.32.2 Memory Exhaustion via Serial RDPDR Device Control
summary: >-
  FreeRDP before 3.32.2 fails to cap the OutputBufferLength in serial
  device-control IRP requests, allowing malicious servers to trigger excessive
  memory allocation. Attackers running a server with serial redirection can send
  an IRP_MJ_DEV…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L'
cvssSource: cna
cwe:
  - CWE-770
vendor: FreeRDP
product: FreeRDP
affected:
  - FreeRDP < 3.32.2
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-03T17:13:34.520903Z'
exploitAvailable: true
published: '2026-11-03'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T17:14:10.501Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-121405'
references:
  - url: 'https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-r387-jjq3-87hv'
    label: GitHub Security Advisory (GHSA-r387-jjq3-87hv)
  - url: >-
      https://www.vulncheck.com/advisories/freerdp-before-3.32.2-memory-exhaustion-via-serial-rdpdr-device-control
    label: >-
      VulnCheck Advisory: FreeRDP before 3.32.2 Memory Exhaustion via Serial
      RDPDR Device Control
tags:
  - cve.org
  - exploit-available
epss: 0.00286
epssPercentile: 0.21287
ingestedAt: '2026-11-05T20:33:06.320Z'
---

## Overview

FreeRDP before 3.32.2 fails to cap the OutputBufferLength in serial device-control IRP requests, allowing malicious servers to trigger excessive memory allocation. Attackers running a server with serial redirection can send an IRP_MJ_DEVICE_CONTROL request with IOCTL_USBPRINT_GET_1284_ID and a near-maximum length to exhaust client memory.

## Affected

- `FreeRDP < 3.32.2`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.